WP
Walter Peterson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Mchenry-County, Illinois
Our Model Tree links this Walter Peterson across the 1910, 1920, 1930 and 1940 US Censuses in Mchenry-County, Illinois (XGBoost, ~Confirmed), with identified parents August & John — first a head (b.~1906), then head of a 5-person household.
Age 34
b. ~1906
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Mchenry-County, Illinois |
| Surname | Peterson |
| Given Name | Walter |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Crystal Lake |
| 1935 Residence (County) | McHenry |
| Additional Details | |
| Occupation | Mechanic |
| Industry | Garage |
| Class of Worker | PW |
| Hours Worked | 50 |
| Income (1939) | 2400 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Mechanic |
| Township / Ward | Crystal Lake |
| Est. Birth Year | ~1906 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Walter | Age | Birth yr |
|---|---|---|---|---|
| Joyce Peterson | Daughter | — | 5 | ~1935 |
| Alice Peterson | Spouse | — | 31 | ~1909 |
| John Peterson | Son | — | 7 | ~1933 |
| Walter Peterson | Head | — | 34 | ~1906 |
| Richard Peterson | Son | — | 2 | ~1938 |
Census Appearances
1910
Mchenry, Illinois
Son, age 4
Mchenry, Illinois · implied b. ~1906 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Walter |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1920
Mchenry, Illinois
Son, age 13
Mchenry, Illinois · implied b. ~1907 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Walter H |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Mchenry, Illinois
Son, age 24
Mchenry, Illinois · implied b. ~1906 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Walter J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Mechanic |
| Industry | Automobile |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Mchenry-County, Illinois
Head, age 34
Mchenry-County, Illinois · implied b. ~1906 — 5 household members
| Surname | Peterson |
| Given Name | Walter |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Crystal Lake |
| 1935 Residence (County) | McHenry |
| Occupation | Mechanic |
| Industry | Garage |
| Class of Worker | PW |
| Hours Worked | 50 |
| Income (1939) | 2400 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links Walter Peterson across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father August Peterson (~0.92 confidence) and father John Peterson (~0.92 confidence) and father John Peterson (~0.92 confidence) and mother Lena Peterson (~0.92 confidence) and mother Lena Peterson (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
August Peterson
b. ~1872
Source father
● Household
· direct · ~0.92
Father
John Peterson
b. ~1872
Source father
● Household
· direct · ~0.92
Father
John Peterson
b. ~1873
Source father
● Household
· direct · ~0.92
Mother
Lena Peterson
b. ~1875
Source mother
● Household
· direct · ~0.92
Mother
Lena Peterson
b. ~1876
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Walter Peterson
Head · 1940 · age 34 · b. ~1906 · Illinois
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Mchenry-County, Illinois
Open full size
1940 US Federal Census — Mchenry-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00840-00128)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ray Powers | 48 | Head | Manager | Illinois |
| 2 | Lillian Powers | 47 | Wife | Housewife | Wisconsin |
| 3 | Raymond Powers | 18 | Son | Student | Illinois |
| 4 | Fred Beeck | 40 | Head | Barber | Germany |
| 5 | Martha Beeck | 31 | Wife | Beauty Operator | Illinois |
| 6 | Otto Glasscoe | 46 | Head | R.R. Agent | Illinois |
| 7 | Georgia Glasscoe | 37 | Wife | Housewife | Illinois |
| 8 | Richard Wayne Glasscoe | 16 | Son | Student | Illinois |
| 9 | Douglas Herbert Glasscoe | 9 | Son | Student | Illinois |
| 10 | Georgia Leigh Glasscoe | 5 | Daughter | — | Illinois |
| 11 | Marjorie Louise Glasscoe | 3 | Daughter | — | Illinois |
| 12 | H. J. Fortune | 42 | Head | Barber | Illinois |
| 13 | Marie Fortune | 37 | Wife | Assembly | Texas |
| 14 | Lawrence Fortune | 20 | Son | Construction | Illinois |
| 15 | Donald Fortune | 18 | Son | Punch Press | Texas |
| 16 | Evelyn Fortune | 15 | Daughter | Student | Illinois |
| 17 | Lorraine Fortune | 13 | Daughter | Student | Indiana |
| 18 | Sharon Ann Fortune | 1 | Daughter | — | Illinois |
| 19 | Walter Peterson THIS PERSON | 34 | Head | Mechanic | Illinois |
| 20 | Alice Peterson | 31 | Wife | Housewife | Wisconsin |
| 21 | John Peterson | 7 | Son | — | Illinois |
| 22 | Joyce Peterson | 5 | Daughter | — | Illinois |
| 23 | Richard Peterson | 2 | Son | — | Illinois |
| 24 | Chas. F. Schroeder | 67 | Head | Assessor | Illinois |
| 25 | Mary Schroeder | 54 | Wife | Housewife | Illinois |
| 26 | Clell J. Simons | 31 | Lodger | Tree Surgeon | Virginia |
| 27 | Virginia Simons | 25 | Lodger | Housewife | Virginia |
| 28 | Elder Ehrke | 29 | Head | Trucker | Illinois |
| 29 | Mabel Ehrke | 25 | Wife | Housewife | Illinois |
| 30 | Beverly Jean Ehrke | 2 | Daughter | — | Illinois |
| 31 | A. W. Mind | 81 | Head | Retired | Wisconsin |
| 32 | Rebecca Mind | 79 | Wife | Housewife | Norway |
| 33 | W. H. Van Natta | 73 | Head | Retired | Illinois |
| 34 | Annie Van Natta | 70 | Wife | Housewife | England |
| 35 | Herman Gristfeld | 35 | Head | Fireman | Illinois |
| 36 | Cora Gristfeld | 35 | Wife | Housewife | Illinois |
| 37 | Carl Rauhut | 62 | Head | Plasterer | Germany |
| 38 | Doris Rauhut | 64 | Wife | Housewife | Germany |
| 39 | Bobby Fabjorn | 9 | Grandson | Student | Illinois |
| 40 | Otto Schwartz | 73 | Head | Retired | Germany |
Pedigree Summary
Walter
Gen 1 · 5 parents
~0.92
Max depth 4 (1900–1950 window)
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)